When we sleep properly, we go through different cycles as the body and mind tend to maintenance and healing.
Harvard University explains sleep this way:
The two main types of sleep are rapid-eye-movement (REM)
sleep and non-rapid-eye-movement (NREM)
sleep. On an EEG, REM
sleep, often called "active sleep," is identifiable by its characteristic low-amplitude (small), high-frequency (fast) waves and alpha rhythm, as well as the eye movements for which it is named. Many sleep experts think that these eye movements are in some way related to dreams. Typically, when people are awakened from REM
sleep, they report that they had been dreaming, often extremely vivid and sometimes bizarre dreams. In contrast, people report dreaming far less frequently when awakened from NREM
sleep. Interestingly, during REM
sleep muscles in the arms and legs are temporarily paralyzed. This is thought to be a neurological barrier that prevents us from "acting out" our dreams.
NREM
sleep can be broken down into three distinct stages: N1, N2,
and N3. In the progression from stage N1
to N3,
brain waves become slower and more synchronized, and the eyes remain still. In stage N3,
the deepest stage of NREM, EEGs
reveal high-amplitude (large), low-frequency (slow) waves and spindles. This stage is referred to as "deep" or "slow-wave" sleep.
Web MD explains the cycles like this:
A lot happens in your body while you sleep. When you get your ZZZs,
you cycle between REM
and non-REM
sleep.
REM
stands for rapid eye movement. During REM
sleep, your eyes move quickly in different directions. That doesn't happen during non-REM
sleep.
First comes non-REM
sleep, followed by a shorter period of REM
sleep, and then the cycle starts over again. Dreams typically happen during REM
sleep.
What Happens During Non-REM Sleep?
There are three phases of non-REM sleep. Each stage can last from 5 to 15 minutes. You go through all three phases before reaching REM sleep.
Stage 1:
Your eyes are closed, but it's easy to wake you up. This phase may last for 5 to 10 minutes.
Stage 2:
You are in light sleep. Your heart rate slows and your body temperature drops. Your body is getting ready for deep sleep.
Stage 3:
This is the deep sleep stage. It's harder to rouse you during this stage, and if someone woke you up, you would feel disoriented for a few minutes.
During the deep stages of NREM
sleep, the body repairs and regrows tissues, builds bone and muscle, and strengthens the immune system.
As you get older, you sleep more lightly and get less deep sleep. Aging is also linked to shorter time spans of sleep, although studies show you still need as much sleep as when you were younger.
What Is REM Sleep?
Usually, REM
sleep happens 90 minutes after you fall asleep. The first period of REM
typically lasts 10 minutes. Each of your later REM
stages gets longer, and the final one may last up to an hour. Your heart rate and breathing quickens.
You can have intense dreams during REM
sleep, since your brain is more active.
Babies can spend up to 50% of their sleep in the REM
stage, compared to only about 20% for adults.
---------------SNIP---------------
During REM
sleep, your mind is doing maintenance. It is breaking down, classifying and filing away the days input.
When your sleep cycle starts to be negatively impacted, problems are going to arise. In this condition, tissue growth, bone, muscle and immune system are all negatively impacted. And further, our mind is not getting the filing done and the "office" of our mind becomes a mess. Think of an office with no proper filing system and papers everywhere in stacks and bundles. Do you think that office is efficient?
This leads to stress factors, confusion, memory problems, health problems and so much more.
The causes of sleep problems are almost unlimited in nature. What can affect our sleep? Well, almost anything! It is different from person to person and there is no one size fits all solution.
That's where hypnosis becomes invaluable.
An experienced hypnotist can take you inside, locate and deal with those issues that are disturbing your sleep. This leads to superior performance in your day to day life. Quicker more positive decisions, Faster, more efficient learning of new information, proper storage of information, faster retrieval of information from memory, clear concise consideration of issues and an all around improvement in your life.
The chart below lays out some of the effects of sleep deprivation. As you can see, not a pretty picture.